Hey I have basically the same set up in my 8 gallon , was having the same issue and so I ant and re read the chemi pure container and the blue version dosnt have anything for phosphate in the media but there chemi pure elite Verizon does so once I went and picked up some phos guard if that's the name problem was solved the greening went down big time and it became control able .
Well that's if you haven't already confirmed that your p04 isn't 0 anyways lol
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10 gal AIO par27 full spectrum Reef
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